#include <bits/stdc++.h>
using namespace std;
#define int long long
// #define LL long long
#define endl '\n'

bool check(int n)
{
	int tmp = n;
	vector<int> v;
	while (tmp > 0)
	{
		v.push_back(tmp % 10);
		tmp /= 10;
	}

	double sum = 0;
	for (int j = 0; j < v.size(); j++) sum += v[j];

	if (sum == (n / sum / sum / 1.0)) return true;
	else return false;
}

void solve()
{
	int cnt = 0;
	for (int i = 1; i <= 10000; i++)
	{
		int x = pow(i, 3);
		if (check(x)) cnt++;
	}
	cout << cnt << endl;
}

signed main()
{
	ios::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);

	solve();

	return 0;
}